Typewriting machine



July 12, 1927. 28

J. LINDBURG v TYPEWRITING MACHINE Filed Oct. 9. 1925 Afro/"new Patented July 12, 1927.

UNITED" STATES PATENT OFFICE.

JOSEPH. LINDBURG, OF BROOKLYN, NEW YORK, ASSIGNOR TO UNDERWOOD TYPE- WRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEWRITING MACHINE.

Application fled October 9, 1925. Serial No. 61,404.

This invention relates to means for facilitating the front insertion of work-sheets in typewriting machines;

When two or more work-sheets are to be inserted around the platen of a typewritin machine, in registering position to eac other, it is sometimes desirable to insert one of the sheets from the front of the machine.

Various expedients have been resorted to in the past, to facilitate the front insertion I of work-sheets, but it has been usually required to rebuild the platen-frame of the machine in order to adapt a regular machine is for front insertion. This, of course, is objectionable since it requires special manufacturing equipment which is costly.

Une of the features of this invention relates to means whereby a standard machine 20 having an introductory chute or table at the rear of the platen, and havin releasable feed-rools, may be arranged or front introduction of the work-sheet, with little or no alteration thereof.

table being below the printing point, and is slightly flared out to provide a bell-mouthed opening, between itself and the peri hery of the platen, for the trailing edge of tlie worksheet. The Underwood standard typewriting machine, in connection with which this invention is illustrated, is rovided with front and rear feed-rolls, bot being operatively mounted on a shaft underlying the platen. The front rolls are operatively connected to the under side of the table in a manner to slide the table downwardly and forwardly away from the platen when the feed-rolls are released, the table bein returned to close, proximity with the p aten when the feed-rolls are rendered operative, thereby providing a guide for the worksheets.

It will be understood that owing to the extreme simplicity of this device it is feasi- According to this invention, the rear tableble to provide standard t ypewriting machines with a front as well as a rear insertion for the work-sheet, thereby rendering the machine more flexible and adaptable to different classes of work without noticeabl increasing the manufacturing cost thereo Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a front view, in elevation, of the p aten-fr-ame of an Underwood standard typewriting machine having the invention applied thereto.

Figure 2 is a side view, in elevation, showing the feed-rolls and the rear table in efi'ectlve position.

Figure 3 is a side View, in elevation, showing t e feed-rolls and the table in a released position, the work-sheet being introduced at the front of the platen. The Underwood standard typewriting machine has a platen 10, revolubly mounted upon end plates 11 of a platen-frame, borne by a carriage, not shown. The end plates 11 are connected together, so as to form a rigid frame, by means of a tie-rod 12 and a cross-bar 13, the latter being secured to the end plates by means of rivets 14.

It'has been customary to provide said Underwood machine with feed-rolls 15 and 16, operatively mounted upon the rod 12, and held in engagement with the platen 10 by means of springs 17 actuating'on tabs 18 and 19, the latter forming an integral part of supporting pieces 19, secured to the rod 12, while the former are bent out of the arms 20 and 21, in which feed-roll shafts 22 are journaled. Said feed-rolls are releasable by means of a manually-operable lever 23, pivotally' mounted upon a stud 24 and operatively connected to an operating shaft 25 by means of a link 26 and an arm 27, forming an inte ral part of said shaft 25, in a manner disc osed in the patent to W. F. Helmond, No. 1,392,940, dated October 11, 1921.

In order to facilitate the front insertion of the work-sheet around the platen, a rear table 28, which serves as a chute for the work-sheet at the introductory side of the platen, is extended downwardly and forwardly, and then under the platen in close roximity thereto, and terminates with a dared-out edge 29 below the printing point in front of a guide 30 for tvDes' 31. The

table is slidably mounted upon the crossbar 13, which is provided with studs 32 fast thereto, the upper ends of the studs being turned down to engage with elongated slots 33 in the table, and the table being held in sliding relationshi with the studs by means of screws 34. %ince it is desired to simultaneously separate the portion underlying the platen from the platen itself, and to release the feed-rolls preparatory to inserting a work-sheet in front of the platen, it has been found advantageous to control the movement of the table by the front arms 20 ofthe front feed-rolls, and to this end, there are provided clips 35, fast to the under side of the table, the clips being provided with hooks 36, designed to engage with the arms 20 in a manner to draw on the table when the feed-rolls are swung to ineffective position, as shown in Figure 3.

The work-sheet is inserted at the front of the platen, as shown in Figure 3, whereupon the feed-rolls are again restored to their normal position, and the platen is rotated backwardly by means of a finger-wheel 37, fast to the platen-axle 38. In order to forcibly restore the table to its normal position when the feed-rolls are restored, the feedrolls are arranged to protrude through openings 39 in the table, to engage with the platen, and the feed-roll-shafts are provided with rollers 40, and 41, respectively, on the front and rear feed-roll-shafts, which rollers engage with the under side of the table and force it upwardly and rearwardly to a position as shown in Figure 2.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, 1 claim:

1. lhe combination with a front-strike typewriting machine having a revoluble periphery of the platen, and means for restoring the position of the table when the feed-rolls are moved to their effective positions.

2. The combination with a typewriting machine having a platen revolubly mounted upon a platen-frame, a cross-bar for stiffening the end plates of said frame, feed-rolls co-operating with said platen to feed worksheets therearound, said feed-rolls being rotatably mounted upon arms, the arms, in turn, being rockably mounted upon a shaft connecting said end plates, means for resiliently holding the feed-rolls in engagement with the periphery of the platen, and means for manually rendering the feed-rolls ineffective, of a rear table slidably mounted upon said cross-bar and extending down.- wardly and forwardly under and around the platen, between the platen and the feedrolls, the latter protruding through openings in the table to engage the platen, and the table terminating with a flared-out edge forming an elongated opening for the worksheet, between itself and the periphery of the platen, and means controlled by the feedrolls effective to slide the table downwardly and forwardly, awa from the platen when the feed-rolls are re eased, and to conversely, move the table rearwardly and upwardly toward the platen and in close proximity thereto when the feed-rolls are rendered operative.

3. The combination with a typewriting machine having a platen revolubly mounted upon a platen-frame, a cross-bar for stifiens ing the end plates of said frame, feed-rolls co-operating with said platen to feed worksheets therearound, said feed-rolls being rotatably mounted upon arms, the arms, in turn, being rockably mounted upon a'shaft connecting said end-plates, means for resiliently holding the feed-rolls in engagement with the periphery of the platen, and means for manually rendering the feed-rolls ineffective, of a rear table slidably mounted upon said cross-bar and extending downwardly and forwardly under and around the platen, between the platen and the feed-rolls, the latter protruding through openings in the table to engage the platen, and the table terminating with a flared-out edge forming an elongated opening for the work-sheets, between itself and the periphery of the platen, and means controlled by the feedrolls effective to slide the table downwardly and forwardly, away from the platen when the feed-rolls are released, and to conversely move the table rearwardly and upwardly toward the platen and in close proximity thereto, when the feed-rolls are rendered operative, said last-mentioned means includin clips fast to the under side of the table an having hooks designed to engage with the arms upon which the feed-rolls are journaled, and rollers rotatably mounted on the feedroll-shafts and adjacent the feed-rolls, said rollers being of smaller diameter than the feed-rolls and engaging with the under side of said table.

4. The combination with a typewrititng machine havin a platen revolubly mounted upon a platenrame, a cross-bar for stifiening the end plates of said frame; feed-rolls co-operating with said platen to feed worksheets therearound, said feed-rolls being rotatably mounted upon arms, the arms, in

turn, ing rockably mounted upon a shaft connecting said end plates, means for resilien'tly holding the feed-rolls in engagementwith the periphery of the platen, and means for manually rendering the feed-rolls ineffective, of a rear table slidably mounted upon studs fast to said cross-bar, the table having elongated slots designed to engage with reduced portions of said studs, and screws for holding the table in sliding relationship with the studs, said table extending forwardly and downwardly, under and around the platen below the printing line thereof, and having a flared edge forming a receiving opening for the work-sheets, between itself and the periphery of the platen, and means operatively connecting the table to the feed-rolls in a manner to afford the movement of the table away from the platen when the feed-rolls are released, and toward the platen, in close proximity thereto, when the feed-rolls are rendered operative.

5. In combination with a typewriting machine, a revoluble platen journaled in end plates, of a platen-frame, a cross-bar at the rear of the platen for stifl'ening said frame,

a rear table slidably mounted on said crossbar, said rear table extending downwardly and forwardly from said bar toward the platen in a line substantially tangent to the periphery of the platen and extending under and around the platen, in close proximity thereto, and terminating with a flaredout edge below the printing line of the platen, manually-releasable feed-rolls under said platen and co-operating therewith to feed a work-sheet therearound, and means operatively connecting said feed-rolls to said table in a manner to afford the displacement of the table away from the platen when the feed-rolls are released, and toward the platen when the feed-rolls are rendered operative.

6. In combination with a typewriting machine, 'a revoluble platen journaled in end. plates, of a platen-frame, a cross-bar at the rear of the platen for stiffening said frame, a rear table slidably mounted on said crossbar, said rear table extending downwardly and forwardly from said bar, toward the platen in a line substantially tangent to the periphery of the platen and extending under and around the platen, in close proximity thereto, and terminating with a flared-out edge below the printing line of the laten, so as to provide a reception opening or the trailing edge of ,a ,frontly-insert'ed worksheet, feed-rolls co-operating with the platen to feed the work-sheet therearound, and means for moving the feed-rolls away from the periphery of the platen, said means being also effective to concomitantly move the table away from the platen when the feedrolls are so moved, and conversely move the table toward the platen when the feed-rolls are thrown in contact with the periphery of the platen.

7. In combination with a typewriting machine, a revoluble platen journaled in end plates, of a platen-frame, a cross-bar at the rear of the platen for stiffening said frame, a rear table slidably mounted on said crossbar, said rear table extending downwardly and forwardly from said bar toward the platen in a line substantially tangent to the periphery of the platen and extending under and around the platen, in close proximity thereto, and terminating with a flaredout edge below the printing line of the laten, so as to provide a reception opening or the trailin edge of a frontly-inserted work-sheet, fee -rolls co-operating with the platen to feed the work-sheet therearound, and means for moving the feed-rolls away from the peri hery of the platen, said means being also e ective to concomitantly move the table away from the platen when the feed-rolls are so moved, and conversely move the table toward the platen when the feedrolls are thrown in contact with the periphery of the platen, said last-mentioned means including clips fast to the table and engaging with feed-roll-operating arms, and rollers adjacent the feed-rolls, said rollers engaging with theunder side of the table in a manner to afford the upward movement of the table when the feed-rolls are thrown to effective position.

JOSEPH LINDBURG. 

